Right about the real trouble with the car part (4,5)
I believe the answer is:
rear light
'the car part' is the definition.
(I've seen this before)
'right about the real trouble' is the wordplay.
'about' means one lot of letters goes inside another.
'trouble' indicates an anagram.
'real' anagrammed gives 'earl'.
'right' placed around 'earl' is 'REAR-LIGHT'.
'with' is the link.
(Other definitions for rear light that I've seen before include "estate needs one" , "safety device!" , "retrospectively this is illuminating" , "shiner" , "car component" .)